| 摘要 |
PROBLEM TO BE SOLVED: To prevent separation of split members constituting a split type core body when they are not used, and to reduce a diameter by a simple operation. SOLUTION: A core body 12 of a film taking-up core 10 comprises an oscillation member 24 and split members 20, 22 kept in a cylindrical shape between a tapered outer circumferential face of a core body-chucking member 17 and a core body-fastening belt 18 in an assembly state. Free end sides of the oscillation member 24 can be oscillated inward with a hinge part formed by the core body-fastening belt 18 as its center so that a diameter of the core body 12 can be reduced.
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